Coal also contains radioactive material. A coal-fired power plant emits more radiation into the air than a nuclear power plant. The world's reserves of fossil fuels are running out. The sulfurous coal which many plants use is more polluting than the coal that was previously used. Most of the anthracite , which plants also burn, has been used up. As more soft coal is used, the amount of pollution will increase. According to estimates, fossil fuels will be burned up within fifty years. There are large reserves of uranium, and new breeder reactors can produce more fuel than they use. Unfortunately this doesn't mean we can have an endless supply of fuel Breeder reactors need a feedstock of uranium and thorium, so w...
If the coal will be used near the coal mine, it can be moved by trucks and conveyors. Coal can also be crushed, mixed with water, and sent through a "slurry" pipeline. Sometimes, coal-fired electric power plants are built near coal mines to lower transportation costs. 15.3 Types of coal Coal is classified into four main types, or ranks (lignite, subbituminous, bituminous, anthracite), depending on the amounts and types of carbon it contains and on the amount of heat energy it can produce. The rank of a deposit of coal depends on the pressure and heat acting on the plant debris as it sank deeper and deeper over millions of years. For the most part, the higher ranks of coal contain more heat-producing energy. Lignite is the lowest rank of coal with the lowest energy content. Lignite coal deposits tend to be relatively...
Taastumatud energiavarad. Avaldatud Creative Commonsi litsentsi ,,Autorile viitamine + jagamine samadel tingimustel 3.0 Eesti (CC BY-SA 3.0)" alusel, vt http://creativecommons.org/licenses/by-sa/3.0/ee/ Energiamajanduse mõiste Energiamajanduses tegeletakse: energiavarade hankimisega (primaarenergia) nafta ja gaasi ammutamine, söe, põlevkivi, turba,...
